I have retired, but if there's anything that would kill me it is to wake up in the morning not knowing what to do. 

What do I think of Western civilization? I think it would be a very good idea.

I do not believe in a fate that falls on men however they act; but I do believe in a fate that falls on them unless they act.

I claim to be a simple individual liable to err like any other fellow mortal. I own, however, that I have humility enough in me to confess my errors and to retrace my steps.

Times and conditions change so rapidly that we must keep our aim constantly focused on the future.

Anger dwells only in the bosom of fools. 

It is the supreme art of the teacher to awaken joy in creative expression and knowledge.

I dream of the realization of the unity of Africa, whereby its leaders combine in their efforts to solve the problems of this continent. I dream of our vast deserts, of our forests, of all our great wildernesses.

The great accomplishments of man have resulted from the transmission of ideas and enthusiasm. 

When you smoke the herb, it reveals you to yourself.

Probable impossibilities are to be preferred to improbable possibilities.

Though we may know Him by a thousand names, He is one and the same to us all.